JP6857340B2 - Mold - Google Patents

Description

The present invention relates to a molded product.

Conventionally, in order to secure a passage on a muddy ground, a cement-based solidifying material or mortar is used to perform a mixing treatment or a coating by spraying to stabilize the ground. In order to secure a waterway, work is being carried out to secure a waterway by excavating a part that should be secured and installing a U-shaped groove or placing concrete on site. All of these methods are construction methods using dedicated machines. However, when it is necessary to carry out these works in a place where a machine cannot be brought in, the work is carried out by manpower and labor, and a method that can be easily carried out has been desired.

As a method that can be easily constructed, a method has been proposed in which a flexible sheet-shaped molded product is brought in, and after the molded product is installed, water is sprinkled on the sheet surface to solidify the molded product.
For example, Patent Document 1 discloses a technique for constructing a prefabricated shelter, and describes that the cover forming the prefab is made of a woven cloth impregnated with cement, and a felt-like non-woven fabric can be used. Has been done. Patent Documents 2 to 4 disclose a technique relating to a flexible fabric that can be solidified so as to be hard or semi-hard, and a space of a surface portion and a second surface portion separated from the surface portion by a space. A fabric is proposed in which the powder material (cement-based material) is filled in the space thereof by connecting with a self-resistant connecting fiber, and the powder material can be solidified by the addition or exposure of a liquid. Patent Documents 5 to 6 propose a composite material in which a knitted fabric having a stab-like fluff having a specific yarn diameter at a texture point of a ground structure is used as a base material and coated with cement. Patent Document 7 proposes a composite material in which a base fabric of a three-dimensional knitted fabric in which an outer material structure and a lining structure are connected by a connecting thread is coated or filled with a thermosetting or thermoplastic resin. Patent Document 8, a seed of a plant, to a CaO / _Al 2 _{O 3} biodegradable nonwoven sheet molar ratio of calcium aluminate-containing material of 1.3 to 3.0 to disperse the 50~1000g per 1 m ² Proposals have been made. Patent Document 9 states that a sheet-like non-woven fabric contains _{calcium aluminates having a CaO / Al 2} O ₃ (molar ratio) of 1.3 to 3, sucrose, and a _{substance containing γ-2CaO / SiO 2 in} a powder form. The present invention relates to a weed-proof sheet that prevents the growth of weeds by laying a non-woven fabric sheet made of organic fibers in which a hydraulic material is dispersed on the ground after weeding, and spraying water or an aqueous polymer emulsion solution on the sheet to solidify it. Proposals have been made.

Patent Document 1 indicates that a felt-like nonwoven fabric may be impregnated with cement. Patent Documents 2 to 6 are molded products in which a woven fabric is impregnated or coated with a cement-based material.

The differences from the present invention will be described below.
In Patent Document 1, the composition of the hydraulic material is different from that of the present invention.
Patent Documents 2 to 4 describe high alumina cement in order to shorten the solidification time. However, in Patent Documents 2 to 7, the composition of the hydraulic material is different from that of the present invention.
Patent Document 8 describes a biodegradable non-woven fabric sheet and a greening weed control method using the same. Patent Document 9 describes a weed control sheet and a weed control method using the same. In Patent Documents 8 to 9, the hydraulic material does not contain cement.

International Publication No. 2005-124063 Special Table 2012-516395 Japanese Unexamined Patent Publication No. 2014-74260 Japanese Unexamined Patent Publication No. 2015-163745 Japanese Unexamined Patent Publication No. 6-91794 Japanese Unexamined Patent Publication No. 6-170995 Japanese Unexamined Patent Publication No. 6-126908 Japanese Unexamined Patent Publication No. 2016-220636 Japanese Unexamined Patent Publication No. 2016-220637

The present invention provides a molded product having high curability and improved crack resistance and strength development.

That is, the present invention is a molded product in which a water-hard material containing cement, calcium aluminates and a non-woven fabric is filled in the gaps of the cloth, and further, the water-hard material is the molded product containing an aggregate. , Calcium aluminates are the molded products containing 60% by mass or less of _{Al 2} O ₃ , calcium aluminates are the molded products containing 5 to 25% by mass of _{SiO 2, and the cloth is woven.} The molded product which is a cloth and / or a non-woven fabric, the molded product which is a non-woven fabric composed of fibers having a thickness of 2 to 20 mm in which the cloth is randomly arranged, and the molding in which a water permeable layer is provided on one side of the cloth. It is a product, the molded product having an impermeable layer on the other side of the cloth, the molded product in the form of a sheet, a cured product of the molded product, and water is sprayed. This is a method for producing the cured product to be cured.

The present invention provides a molded product having high curability and improved crack resistance and strength development.

The present invention uses a hydraulic material. As the hydraulic material, hydraulic powder is preferable.

Examples of the cement of the present invention include various Portland cements such as ordinary, early-strength, ultra-fast-strength, low-heat and moderate-heat, various mixed cements mixed with blast furnace slag, fly ash or silica, and fine powder cement obtained by adjusting the particle size of these. Can be mentioned. One or more of these can be used. Of these, Portland cement is preferred. Among Portland cements, ordinary Portland cements are usually preferred.

The particle size of the cement is preferably a brain specific surface area of 2000 cm ² / g or more, and preferably 3000 cm ² / g or more in terms of strength development.

The calcium aluminates of the present invention, CaO material, Al ₂ O ₃ raw material, a mixture of SiO ₂ raw material if necessary, or by melting or firing kiln or in an electric furnace or the like, heat treatment etc. Calcium aluminates obtained by heating and cooling. As other components, alkali metal salts such as sodium, potassium and lithium may be partially dissolved.

The calcium aluminates of the present invention are preferably amorphous calcium aluminates that have been rapidly cooled after melting in terms of curability and strength development.

In the calcium aluminates, the CaO content is preferably 20% by mass or more, more preferably 30% by mass or more, and most preferably 40% by mass or more. In the calcium aluminates, the CaO content is preferably 60% by mass or less, more preferably 55% by mass or less, and most preferably 50% by mass or less. If it is less than 20% by mass, the strength may not be exhibited.

In calcium aluminates, the Al ₂ O ₃ content is preferably 20% by mass or more, more preferably 30% by mass or more, and most preferably 40% by mass or more in terms of strength development. In the calcium aluminates, the Al ₂ O ₃ content is preferably 70% by mass or less, more preferably 60% by mass or less, and most preferably 50% by mass or less.

In the calcium aluminates, the SiO ₂ content is preferably 5% by mass or more, more preferably 10% by mass or more. In the calcium aluminates, the SiO ₂ content is preferably 25% by mass or less, more preferably 20% by mass or less. If SiO ₂ is less than 5% by mass, the effect of improving durability and strength development may not be exhibited, and if it exceeds 25% by mass, curability and strength development may be lowered.

The vitrification rate of calcium aluminates is preferably 70% or more, more preferably 90% or more, in terms of reaction activity. If it is less than 70%, the strength development may decrease. For the vitrification rate, the main peak area S of the crystal minerals of the calcium aluminates of the present invention was measured in advance for the sample before heating by powder X-ray diffraction method, and then heated at 1000 ° C. for 2 hours and then 1 to 10 ° C. _{Slowly cool at a cooling rate of / min, determine the main peak area S 0} of the crystalline mineral after heating by powder X-ray diffraction, and use these S ₀ and S values to make glass using the following formula. Calculate the conversion rate χ.
Vitrification rate χ (%) = 100 × (1-S / S ₀ )

The particle size of the calcium aluminates is in terms of strength development, preferably not less than Blaine specific surface area of ^{3000cm 2 / g, 5000cm 2 /} g or more is more preferable. If it is less than 3000 cm ² / g, the strength development may decrease.

The amount of the calcium aluminates used in the present invention is preferably 1 to 30 parts by mass, more preferably 5 to 25 parts by mass, and most preferably 10 to 20 parts by mass with respect to 100 parts by mass of cement. If it is less than 1 part by mass, sufficient curability may not be obtained, and if it exceeds 30 parts by mass, long-term strength development may be hindered.

The gypsum of the present invention can improve the strength development when used in combination with calcium aluminates. Examples of gypsum include gypsum dihydrate, gypsum semi-water, gypsum anhydrous and the like. Among these, anhydrous gypsum is preferable in terms of strength development. Examples of the anhydrous gypsum include hydrofluoric acid by-product anhydrous gypsum and natural anhydrous gypsum. The pH when the gypsum is immersed in water preferably shows a weak alkaline to acidic value, and more preferably pH 8 or less. If the pH exceeds 8, the solubility of the gypsum component becomes high, which may inhibit the strength development. The pH referred to here is the pH of the diluted slurry at 20 ° C. of sekko / ion-exchanged water = 1 g / 100 g, measured using an ion-exchange electrode or the like.

The particle size of the gypsum of the present invention, in that the proper working time and curing and strength development can be obtained, preferably at least Blaine specific surface area of ^{3000cm 2 / g, 4000cm 2 /} g or more is more preferable.

The amount of gypsum used in the present invention is preferably 70 to 300 parts by mass, more preferably 100 to 200 parts by mass with respect to 100 parts by mass of calcium aluminates. If it is less than 70 parts by mass, sufficient curability and strength development may not be obtained, and if it exceeds 300 parts by mass, long-term strength development may be hindered.

In the present invention, it is preferable to use an aggregate in order to secure short-term and long-term strength. As the type of aggregate, commercially available natural limestone, limestone-derived aggregate, siliceous-derived aggregate, and heavy-weight aggregate having a specific gravity of more than 3.0 can be used. Further, for the purpose of weight reduction, balloon-based aggregate can be used for a part or all of the aggregate to be used. Of these, fine aggregate is preferred. The maximum particle size of the aggregate is preferably 5.0 mm or less, more preferably 2.5 mm or less, and most preferably 0.8 mm or less.

The amount of aggregate used is preferably 30 to 300 parts by mass, more preferably 50 to 200 parts by mass, based on 100 parts by mass of the total of cement, calcium aluminates and gypsum. If the amount used is too small, it may not contribute to the strength development. If the amount used is too large, the filling property into the molded product may be hindered.

Among the cloths of the present invention, woven cloths and non-woven fabrics are preferable. The woven fabric preferably has a three-dimensional structure in consideration of the filling property of the hydraulic material, and a typical example thereof is a honeycomb mesh or the like. Woven fabrics have a lower fiber density and higher cost than non-woven fabrics, but have excellent filling properties.

Among the cloths, non-woven fabrics are preferable because they have low crack resistance after solidification. The non-woven fabric is not particularly limited as long as it is a non-woven fabric in which fibers are randomly arranged and entangled with each other. Nonwoven fabrics are manufactured by entwining fibers with air or high-pressure water flow using short fibers as raw materials, those manufactured by blowing off molten resin with air, those manufactured by repeatedly piercing needles and entwining fibers with each other, and heat fusion. A fleece mixed with fibers is heat-bonded through hot rolls or blown with hot air to bond the fibers to each other, or an emulsion-based adhesive resin is impregnated or sprayed onto the fleece. , It is manufactured by heating and drying and adhering the intersections of fibers. Examples of the fiber material include polyolefins such as polyethylene and polypropylene, chemical fibers such as rayon, nylon, polyester, acrylic, aramid and glass, and natural fibers such as cotton, wool and hemp. It is also possible to use a mixed non-woven fabric in which two or more of these are used in combination. Among these, synthetic fibers are preferable because they are easily available. Among the synthetic fibers, polyolefin is preferable. Among the polyolefins, polyester and polypropylene are preferable. Among the non-woven fabrics, a non-woven fabric having a thickness of 2 to 20 mm in which fibers are randomly arranged is preferable.

The thickness of the cloth of the present invention is preferably 2 to 20 mm, more preferably 5 to 10 mm. If the thickness is too thin, the strength after solidification may be insufficient and the crack resistance may be reduced. If the thickness is too thick, the molded product becomes heavy and workability may deteriorate.

Basis weight of the fabric of the present invention is preferably ^{50~500g / m 2, 80~300g / m} 2 is more preferable. If the basis weight is small, the filled hydraulic material may segregate in the sheet. If the basis weight is large, the filling property of the hydraulic material may decrease.

The amount of the hydraulic material used in the present invention is preferably 0.1 kg or more per ^{1 m 2 of cloth and 1 mm of thickness.} If the weight is less than 0.1 kg, the hydraulic material may segregate in the sheet due to insufficient filling. When the gaps between the cloths are filled with the hydraulic material to produce a molded product, the space volume of the cloth is adjusted so as not to be filled with the hydraulic material excessively. The molded product is preferably in the form of a sheet. The sheet is, for example, a thin and wide sheet. The amount of the hydraulic material used in the present invention is preferably 5 kg or less per ^{1 m 2 of cloth and 1 mm of thickness.}

A water permeable layer can be provided on one side (upper surface, side not in contact with the ground) of the molded product of the present invention. By providing the water permeable layer, there is an effect of preventing leakage of the hydraulic material from the surface and allowing water to permeate into the hydraulic material layer of the molded product. The water-permeable layer is not particularly limited, but includes a non-woven fabric having a basis weight such that the hydraulic material does not leak, a porous membrane having pores so that the hydraulic material does not leak, and a water-soluble sheet such as polyvinyl alcohol. Can be mentioned.

An impermeable layer can be provided on one side (lower surface, side in contact with the ground) of the molded product of the present invention. The impermeable layer of the present invention is provided so that the filled hydraulic material stays inside the cloth and the sprinkled water does not flow out to the ground side. The material of the impermeable layer is not particularly limited, and examples thereof include the same materials as those of the non-woven fabric.

The bonding between the water-permeable layer or the impermeable layer of the present invention and the cloth is not particularly limited, but may be bonded by an adhesive, an adhesive, heat fusion or the like. A grit such as glass fiber having a reinforcing effect may be provided between the cloth and the impermeable layer or between the cloth and the water permeable layer.

The molded product of the present invention has a structure such as a single cloth filled with a water-hard material, a structure in which a water-permeable layer is provided on one side of the cloth, a structure in which a water-permeable layer is provided on one side of the cloth, and a water-permeable layer on one side of the cloth. The cloth may be provided with an impermeable layer on the other side of the cloth, or a water permeable layer may be provided on both sides of the cloth.

As a method for producing a molded product of the present invention, for example, a method in which a cloth having an impermeable layer bonded to a side in contact with a shaking table is installed and a water-hard material is vibrated to fill the gaps between the cloths, a rotating brush. There are a method of filling the gaps of the cloth by brushing using the above, a method of filling the gaps of the cloth by impregnation under reduced pressure, a method of using these in combination, and the like. At that time, if the water-hard material leaks to the outside from the side surface of the cloth, the side surface of the cloth is blocked with adhesive tape, a sealing material, heat fusion, etc. in advance to prevent leakage, or the water-hard material is filled. After that, a few mm region of the sheet edge portion may be solidified with water to prevent leakage of the water-hard material. For cloth (particularly non-woven fabric) produced by blowing the molten resin with air, it is also possible to produce a molded product by blowing the resin and at the same time blowing off the hydraulic material with air. When joining the water-permeable layer after filling the hydraulic material, for example, the sheet to be joined may be laminated on the filled cloth and joined by heat fusion.

The mass and size of the molded product of the present invention are not particularly limited, but are preferably 50 kg or less when transported by human power. When transporting by machine using a crane or the like, there is no problem even if it exceeds 50 kg. When transported by human power, the sheet area of the molded product ^{is preferably 2 m 2} or less in consideration of the mass that can be transported.

The molded product of the present invention is solidified by adding water or the like. Examples of the method of adding water include a method of installing a molded product on the ground and then sprinkling water on the surface using a watering can, a sprayer, or the like.

The amount of water to be sprinkled is preferably 0.01 to 5 kg, more preferably 0.1 to 0.5 kg per ^{1 m 2 of cloth and 1 mm of thickness.} If the amount of water is small, curing failure may occur. If the amount of water is large, the strength of the solidified molded product may be weakened. Basically, it is preferable to spray appropriate water immediately after construction, but if a sufficient amount of water cannot be secured, it can be naturally solidified by using rain or the like. In that case, it is preferable to spray 0.3 kg or more of water in order to solidify the surface layer portion immediately after the construction so that the solidifying component is not washed away.

Since the impermeable layer can be provided in the present invention, the outflow of earth and sand can be prevented. Since the impermeable layer can be provided in the present invention, drainage can be efficiently performed for the purpose of forming a water channel.

Hereinafter, a detailed description will be given based on the examples.

An unfilled sheet-shaped molded product (length 0.5 m x width 0.5 m) made of a water-permeable polypropylene non-woven fabric having a basis weight of 100 g / m ^{2 and a thickness of 7 mm was prepared.} Place the molded product on a shaking table, ^{spread the hydraulic material shown in Table 1 on the surface of the molded product so that the amount used is 1 kg / m 2} mm, adjust the frequency to 40 Hz, apply vibration, and use a rotating brush. Filled while brushing. Water was sprinkled on the obtained sheet-shaped molded product filled with the water-hard material by 0.2 kg / m ² mm using a sprayer, and the cured state was confirmed after 20 minutes, and the presence or absence of cracks after 1 month was confirmed. , The compressive strength of the test piece obtained by solidifying the filled water-hard material alone at 35 ° C. was confirmed. The results are shown in Table 1.

(Material used)
Ordinary Portland Cement: SiO ₂ 22.1% by weight in terms of oxide, CaO 63.7 wt%, _Al 2 _{O 3} is contained 5.1 wt%, Blaine specific surface area of 3300 cm ² / g, commercially available anhydrous gypsum : Natural anhydrous gypsum, brain specific surface area 4800 cm ^{2 /} g, pH 7.2
Limestone aggregate: Maximum particle size 0.6 mm, water-hard material A from Qinghai Mine, Niigata Prefecture A: Commercially available special grade reagents CaCO ₃ and Al ₂ O ₃ are mixed in a predetermined ratio with 100 parts by mass of ordinary Portoland cement. Calcium aluminates (100% vitrification, 0% by mass _{of SiO 2 in} terms of oxide, 43 of CaO) prepared by heating and melting at about 2000 ° C. using a high-frequency furnace, quenching in water, and crushing. mass%, _Al 2 _{O 3} calcium aluminates of 55 wt%, Blaine specific surface area of 6050cm ² / g) 15 parts by mass, hydraulic of anhydrous gypsum was 150 parts by mass to calcium aluminates 100 parts by Material Water-hard material B: Ordinarily, 100 parts by mass of Portoland cement _{is mixed with commercially available special grade reagents SiO 2} , CaCO ₃ , and Al ₂ O ₃ in a predetermined ratio, and heated at about 2000 ° C. using a high-frequency furnace. melted, quenched in water, crushed calcium aluminates prepared by (vitrification ratio 100%, SiO ₂ is 15.2 wt% in terms of oxide, CaO 41.7 wt%, and _Al 2 _{O 3} 42.2% by mass of calcium aluminates, brain specific surface area 6000 cm ² / g) is mixed in 15 parts by mass, and 100 parts by mass of calcium aluminates is mixed with 150 parts by mass of anhydrous sucrose. _{Commercially available special grade reagents SiO 2} , CaCO ₃ , and Al ₂ O ₃ are mixed in a predetermined ratio with 100 parts by mass of ordinary Portoland cement, heated and melted at about 2000 ° C. using a high frequency furnace, and rapidly cooled in water. Calcium aluminates prepared by crushing (100% vitrification, _{5.3% by mass of SiO 2 in} terms of oxide, 46.5% by mass of CaO, 47.2% by mass of _{Al 2} O _3). Water-hard material in which 15 parts by mass of calcium aluminates, brain specific surface area 5900 cm ² / g) and 150 parts by mass of anhydrous sucrose are mixed with 100 parts by mass of calcium aluminates Water-hard material D: 100 parts by mass of ordinary Portoland cement On the other hand, commercially available special grade reagents SiO ₂ , CaCO ₃ , and Al ₂ O ₃ are mixed at a predetermined ratio, heated and melted at about 2000 ° C. using a high-frequency furnace, rapidly cooled in water, and pulverized to prepare. Calcium carbonates (100% vitrification, _{24.5% by mass of SiO 2 in} terms of oxide, 36.8% by mass of CaO, 37.4% by mass of _{Al 2} O ₃₎ Luminates, brain specific surface area 5800 cm ² / g) in 15 parts by mass, calcium aluminates in 100 parts by mass, and anhydrous sucrose in 150 parts by mass. Water-hard material Water-hard material E: Water-hard material A with respect to 100 parts by mass Water-hard material containing 100 parts by mass of limestone aggregate Water-hard material F: Water-hard material containing 100 parts by mass of limestone aggregate with respect to 100 parts by mass of water-hard material B Water-hard material G: Ordinary Portoland cement 100 Water-hard material in which 100 parts by mass of limestone aggregate is blended with respect to parts by mass Water-hard material H: Commercially available alumina cement No. 1 (SiO ₂ is 0% by mass, CaO is 36.7% by mass, Al _{2 in terms of oxide)} O ₃ is 63.3 wt%, Blaine specific surface area of 3100 cm ² / g) with respect to 100 parts by weight of hydraulic material limestone aggregate were blended 100 parts by weight of hydraulic material I: _SiO 2 commercial grade reagents, CaCO ₃ , Al ₂ O ₃ are mixed at a predetermined ratio, heated and melted at about 2000 ° C. using a high-frequency furnace, rapidly cooled in water, and pulverized to prepare calcium carbonates (vitrification rate 100%, oxidation). SiO ₂ is 15.2 wt% with the object terms, CaO 41.7 wt%, _Al 2 _{O 3} calcium aluminates of 42.2 wt%, relative to the Blaine specific surface area of 6000cm ² / g) 100 parts by weight , Water-hard material containing 150 parts by mass of anhydrous sucrose Water-hard material J: Commercially available special grade reagents SiO ₂ , CaCO ₃ , and Al ₂ O ₃ are mixed in a predetermined ratio with 100 parts by mass of ordinary Portoland cement. Calcium aluminates (100% vitrification, 15.2% by mass _{of SiO 2 in} terms of oxide, CaO) prepared by heating and melting at about 2000 ° C using a high-frequency furnace, quenching in water, and crushing. 41.7 wt%, _Al 2 _{O 3} is 42.2 wt% of calcium aluminates, Blaine specific surface area of 6000 cm ² / g) 15 parts by mass compounded hydraulic materials

(Test method)
Brain specific surface area: Measured according to JIS R 5201-1997.
Maximum particle size: Aggregate was screened according to JIS A 1102, and the size of the largest sieve that did not completely pass through was taken as the maximum particle size.
Hardened state: The surface of the molded product 20 minutes after sprinkling water was pierced by a Proctor penetration tester equipped with a needle having ^{a cross-sectional area of 12.5 mm 2 in accordance with JISA 1147.} It was penetrated 5 times. When the penetration resistance value was 1.5N, it was marked as ◯ if the needle did not penetrate the molded product 5 times, Δ if the needle did not penetrate the molded product 1 to 4 times, and × if it penetrated the molded product 5 times. ..
Presence or absence of cracks: Observe the appearance of the sheet when it is cured in a constant temperature and humidity chamber with a temperature of 35 ° C and a humidity of 60% for 1 month. The case where the above was generated was evaluated as Δ, the case where the crack having a width of 0.15 to 0.2 mm was generated was evaluated as ▲, and the case where the crack exceeding 0.2 mm was generated was evaluated as ×.
Compression strength: In a constant temperature and humidity chamber with a temperature of 35 ° C and a humidity of 60%, the water-hard material used for filling was packed in a 4 x 4 x 16 cm mold, and water was applied from the surface to 100 parts by mass of the water-hard material. The test piece solidified by sprinkling water with a sprayer so as to have 20 parts by mass was cured under the same conditions as the confirmation test for the presence or absence of cracks, and the compressive strength was measured at 7 days and 6 months of age.

As shown in Table 1, it can be seen that the sheet-shaped molded product filled with the hydraulic material of the present invention solidifies within 20 minutes, and that the crack resistance at a high temperature of 35 ° C. is also high. In particular, the crack resistance of calcium aluminates containing _{SiO 2 is high.} The compressive strength of the hydraulic material of the present invention shows long-term strength development, but it can be seen that the long-term strength is reduced in the comparative example using alumina cement No. 1. Increase _{which, CaO · Al 2 O 3 ·} 10H 2 O produced in the hydration reaction of alumina cement, void by _{3CaO · Al 2 O 3 · 6H} 2 metastasized to O free water occurs over time It is thought that this is to be done.
Therefore, in consideration of the summer when the temperature rises, it is possible to achieve early opening and improvement of durability by using the sheet-shaped molded product of the present invention. It can be seen that when cement is not used, the cured state is good and cracks do not occur at high temperatures, but the strength development is small. It can be seen that when gypsum is not used, the cured state is poor and the strength development is low.

The same procedure as in Example 1 was carried out except that a woven fabric was used instead of the polypropylene non-woven fabric and the three-dimensional woven fabric was filled with the hydraulic material shown in Table 2. The results are shown in Table 2.

(Material used)
Woven fabric: Three-dimensional woven fabric, honeycomb mesh sheet with a unit of thickness 10 mm, major axis direction 7 mm, minor axis direction 5 mm, commercially available product

As shown in Table 2, when the woven fabric of the present invention is used, the crack resistance is improved as compared with the comparative example, but the crack resistance is lower than when the non-woven fabric of Example 1 is used.

The same procedure as in Example 1 was carried out except that the thickness of the non-woven fabric was changed as shown in Table 3 using the hydraulic material B. The results are shown in Table 3.

(Test method)
Mass: The mass of the sheet-shaped molded product when cured in a constant temperature and humidity chamber at a temperature of 35 ° C. and a humidity of 60% for 1 month was measured.

From Table 3, the crack resistance can be improved by increasing the thickness of the non-woven fabric to 2 mm or more. When the thickness of the non-woven fabric is 20 mm or less, the sheet-shaped molded product is lightweight and can be transported by human power.

An unfilled sheet-shaped molded product (length 0.5 m x width 0.5 m) made of a water-permeable polypropylene non-woven fabric having a basis weight of 100 g / m ^{2 and a thickness of 7 mm was prepared.} The molded product was placed on a shaking table, and the hydraulic material B ^{was spread on the surface of the molded product so as to have a frequency of 1 kg / m 2} mm, adjusted to a frequency of 40 Hz, vibrated, and filled while brushing with a rotating brush. ^{A polypropylene non-woven fabric having a basis weight of 250 g / m 2} and a thickness of 0.1 mm is bonded to one side of the sheet-shaped molded product filled with the obtained hydraulic material by heat fusion, and the inside of the sheet-shaped molded product is bonded. The hydraulic material was processed so that it would not leak to the outside. ^{Water was sprinkled at 0.2 kg / m 2} mm using a sprayer, and the cured state after 20 minutes was confirmed by touch. As a result, it was confirmed that it solidified within 20 minutes as in Experiment No. 1-2.

Unfilled sheet molding by heat-sealing a permeable polypropylene sheet with a thickness of 0.5 mm to form an impermeable layer on one side of a permeable polypropylene non-woven fabric with a basis weight of 100 g / m ^{2 and a thickness of 7 mm.} An object (length 0.5 m x width 0.5 m) was produced. The molded product was placed on a shaking table, and the hydraulic material B ^{was spread on the surface of the molded product so as to have a frequency of 1 kg / m 2} mm, adjusted to a frequency of 40 Hz, vibrated, and filled while brushing with a rotating brush. ^{A polypropylene non-woven fabric having a basis weight of 250 g / m 2} and a thickness of 0.1 mm is bonded to the other side of the sheet-shaped molded product filled with the obtained hydraulic material by heat fusion, and the inside of the sheet is bonded. Processed so that the hydraulic material does not leak to the outside. ^{Water was sprinkled at 0.2 kg / m 2} mm using a sprayer, and the cured state after 20 minutes was confirmed by touch. As a result, it was confirmed that it solidified within 20 minutes as in Experiment No. 1-2.

Unfilled sheet molding by heat-sealing a permeable polypropylene sheet with a thickness of 0.5 mm to form an impermeable layer on one side of a permeable polypropylene non-woven fabric with a basis weight of 100 g / m ^{2 and a thickness of 7 mm.} An object (length 0.5 m x width 0.5 m) was produced. The prepared molded product was placed on a shaking table, and the hydraulic material shown in Table 4 ^{was spread on the surface of the molded product so as to be 1 kg / m 2} mm, adjusted to a frequency of 40 Hz, vibrated, and brushed with a rotating brush. Filled while filling. Water was sprinkled on the obtained sheet-shaped molded product filled with the hydraulic material by 0.2 kg / m ² mm using a sprayer, and the evaluation was carried out in the same manner as in Example 1. The results are shown in Table 4.

As shown in Table 4, it can be seen that the sheet-shaped molded product filled with the hydraulic material of the present invention solidifies within 20 minutes, and that the crack resistance at high temperature is also high. In particular, the crack resistance of calcium aluminates containing _{SiO 2 is high.} By providing the impermeable layer, water stays in the sheet-shaped molded product, so that a sufficient hydration reaction proceeds, and crack resistance and strength development are exhibited as compared with the case where the impermeable layer is not provided (Example 1). Improvement is also recognized.

Experiment No. The sheet-shaped molded product of 6-6 was exposed outdoors, and the appearance after a lapse of a predetermined period was observed. For comparison, the appearance was compared with that of the hydraulic material alone, which was solidified to the same thickness without using cloth. As a result, even after 2 years, there were no cracks in appearance, and no water leaked from the ground side surface even when water was sprayed. On the other hand, in the case where the hydraulic material was solidified by itself without using a non-woven fabric, cracks occurred after one year, and the solidified material was cracked.

The present invention has the following advantages.

The present invention can be rapidly applied. In the present invention, the cotton-like non-woven fabric can be impregnated with a hydraulic material containing calcium aluminates, so that the solidification time can be shortened. By using calcium aluminates having a composition different from that of alumina cement, the present invention can provide a solidified molded product having excellent durability, which solidifies more rapidly than alumina cement and does not reduce the strength at high temperature.

Since the molded product of the present invention is flexible and can be made into a roll, it can be carried by human power by reducing its mass, for example, by reducing the weight to 20 kg or less. By placing the sheet-shaped molded product of the present invention on the ground and sprinkling water with a watering can, a sprayer, or the like, the hydraulic material in the molded product can be solidified.

The molded product of the present invention does not require water weighing work or water mixing work, secures a passage on muddy ground even in a place where a dedicated machine cannot be introduced, prevents the outflow of earth and sand such as a slope, weed control, and a waterway. It can be easily secured and lined.

The molded product of the present invention can be solidified in a short time by sprinkling water after being installed on the ground, and can easily protect or strengthen the ground without a dedicated machine. In the molded product of the present invention, the fibers exert the effect of reducing cracks after the hydraulic material is solidified, so that a highly durable coating layer can be easily constructed.

Claims (11)

A molded product in which a hydraulic material containing cement, calcium aluminates, and gypsum is filled in the gaps between cloths. The molded product according to claim 1, wherein the hydraulic material contains an aggregate. The molded product according to claim 1 or 2, wherein the calcium aluminates _{contain 60% by mass or less of Al 2} O _3. The molded product according to claim 1, wherein the calcium aluminates contain 5 to 25% by mass of _{SiO 2.} The molded product according to claim 1, wherein the cloth is a woven cloth and / or a non-woven fabric. The molded product according to claim 1, wherein the cloth is a non-woven fabric composed of randomly arranged fibers having a thickness of 2 to 20 mm. The molded product according to claim 1, wherein a water permeable layer is provided on one side of the cloth. The molded product according to claim 1, wherein an impermeable layer is provided on the other side of the cloth. The molded product according to claim 1, wherein the molded product is in the form of a sheet. The cured product of the molded product according to claim 1. The method for producing a cured product according to claim 10, wherein water is sprayed to cure the cured product.